--TEST-- MongoDB\Driver\Session::advanceOperationTime() --SKIPIF-- --FILE-- startSession(); $sessionB = $manager->startSession(); $command = new MongoDB\Driver\Command(['ping' => 1]); $manager->executeCommand(DATABASE_NAME, $command, ['session' => $sessionA]); echo "Initial operation time of session B:\n"; var_dump($sessionB->getOperationTime()); $sessionB->advanceOperationTime($sessionA->getOperationTime()); echo "\nOperation time after advancing session B:\n"; var_dump($sessionB->getOperationTime()); echo "\nSessions A and B have equivalent operation times:\n"; var_dump($sessionA->getOperationTime() == $sessionB->getOperationTime()); ?> ===DONE=== --EXPECTF-- Initial operation time of session B: NULL Operation time after advancing session B: object(MongoDB\BSON\Timestamp)#%d (%d) { ["increment"]=> string(%d) "%d" ["timestamp"]=> string(%d) "%d" } Sessions A and B have equivalent operation times: bool(true) ===DONE===